A North-South Metallicity Asymmetry in the Outer Galactic disk — Evidence for the Pericentric Passage of the Sagittarius Dwarf Galaxy
Chun Wang, Yang Huang, Timothy C. Beers, Payel Das, Haibo Yuan, Lizhi Xie, Shi Shao
arXiv:2507.21551v2 Announce Type: replace
Abstract: We present maps of the mean metallicity distributions on the Galactocentric $R$–$Z$ plane at different azimuthal angles using red clump stars selected from the LAMOST and APOGEE surveys. In the inner disk ($R 11$,kpc), especially towards the anti-Galactic center ($-5^circ 8$ Gyr) compared to younger ones ($tau arXiv:2507.21551v2 Announce Type: replace
Abstract: We present maps of the mean metallicity distributions on the Galactocentric $R$–$Z$ plane at different azimuthal angles using red clump stars selected from the LAMOST and APOGEE surveys. In the inner disk ($R 11$,kpc), especially towards the anti-Galactic center ($-5^circ 8$ Gyr) compared to younger ones ($tau